Well I need to think very carefully about its dimensions. The tank is 30 x 20 x 20". However it will be placed in front of the overflow on the left hand side. So the most room front to back of the tank would be 15".
So, I am thinking its width would be 12". Length from left to right 15 - 16" (I think I will make the arm on the right slightly longer).
And it's height about 13 - 14".
Looking for some comments about these proportions.
I think also I will need to add a small island type structure on the right of the aquarium and further to the back.
Thoughts anyone please?